March 31, 2015, Tuesday

Two different epidemics have prompted eerily similar reactions from health officials and the public, raising crucial questions about why the world remains persistently unprepared to react to the emergence of viral threats.

July 15, 2014, Tuesday

News of the first face transplant, in 2005, was greeted with doubts and criticism. But the first comprehensive review of the more than two dozen such procedures since then has removed many early concerns.